JPH0571239A - Vibration control apparatus built in frame - Google Patents

Abstract

PURPOSE:To make smooth operation of absorption of vibration energy possible even in the case where ambient temperature varies by a method wherein the title apparatus is constructed of visco-elastic members having different temperature dependencies in terms of rigidity that are connected in parallel with each other and are provided between a beam and vibration-resistant element members. CONSTITUTION:In the case where vibrations in the directions marked with arrows A and B occur to a structure 1, vibrations relative to the directions marked with arrows A and B occur between beams 3 and a wall 5. However, energy of such vibrations is absorbed by deformation of visco-elastic members 12A, 12B and 12C provided between fixing members 10 and 11 of visco-elastic dampers 6A, 6B and 6C. As the visco-elastic members 12A, 12B and 12C of the visco-elastic dampers 6A, 6B and 6C provided in parallel with one another between the beam 3 and the wall 5 have different temperature dependencies in terms of the rigidity, they are able to keep constantly a specified rigidity EX suitable for absorbing vibration energy in the case of earthquake over a wide temperature range EX in which the ambient temperature varies. Therefore, at least one or more of the visco-elastic dampers 6A, 6B and 6C provided in parallel with one another develop appropriate rigidity, and thereby absorption of the vibration energy can be made smoothly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame-incorporated type vibration damping device which can be incorporated into a column or beam portion of a structure to exert a vibration damping effect.

2. Description of the Related Art Recently, various types of vibration damping devices have been proposed in order to suppress the shaking generated in a structure due to an earthquake, wind, or the like, but many of them have been incorporated in the foundation of the structure. However, in addition to such a method, if there is a vibration damping device capable of absorbing vibration in each layer of the structure, even if the vibration damping performance of each individual device is relatively small, it can effectively work. Development was desired.

Therefore, there has been proposed a frame-incorporated type vibration damping device in which the walls of each floor are connected to the beams by viscoelastic members, and the vibration generated during an earthquake is absorbed by the viscoelastic dampers. Has been done. However, since the rigidity of the viscoelastic member that constitutes the viscoelastic damper changes greatly depending on the temperature, it is difficult to make the vibration damping device exhibit stable performance. SUMMARY OF THE INVENTION It is an object of the present invention to provide a frame built-in type vibration damping device in which the change in rigidity due to temperature is small in order to solve the above-mentioned drawbacks.

[0002]

That is, the present invention has a plurality of columns (2) and beams (3), and among the columns and beams, the seismic element member (5) is provided between adjacent columns and beams. ) Is provided in the structure, between the beam and the seismic element member,
A viscoelastic member (1 having different temperature dependence for rigidity)
2A, 12B, 12C) are connected in parallel.

With the above-described structure, the present invention has the viscoelastic members (12A, 12A) provided in parallel even if the ambient temperature changes.
At least one viscoelastic member (12A or 12B or 12C) of (B, 12C) acts so as to exhibit appropriate rigidity.

[0003]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing an embodiment of a frame built-in type vibration damping device according to the present invention, FIG. 2 is a side view showing an example of a viscoelastic damper, FIG. 3 is a front view showing another example of a viscoelastic damper, Figure 4
Is a temperature-rigidity curve of various viscoelastic members.

As shown in FIG. 1, the structure 1 has pillars 2 standing upright at a predetermined interval, and a beam 3 is formed between the pillars 2 so as to connect the pillars 2 to each other. It is installed horizontally. A wall 5 made of precast concrete is provided in a space surrounded by columns 2 and 2 adjacent to each other in the horizontal direction and beams 3 and 3 adjacent to each other in the vertical direction in a form connected to the beam 3 below in the drawing. Between the upper edge 5d of the wall 5 in the figure and the lower surface 3d of the beam adjacent to the upper edge portion 5d, three viscoelastic dampers 6A,
6B and 6C are provided in parallel so as to connect the beam 3 and the wall 5. The viscoelastic dampers 6A, 6B, 6C of the wall 5
Spaces 9 are formed between the pillars 2 and the beams 3 on both side edges 5c, 5c and the upper edge 5d in the figure other than the portion supported by the.

On the other hand, the viscoelastic dampers 6A, 6B and 6C are
As shown in FIG. 2, mounting members 10 and 10 having an L-shaped cross section, which are fixed to the wall 5 side via a base plate 8, extend member mounting surfaces 10a and 10a facing each other and extending in a direction perpendicular to the plane of the drawing. It is provided in a shape, and the member mounting surface 10
A mounting member 11 having a T-shaped cross section is provided between the members 10a and 10a and has member mounting surfaces 11a and 11a.
It is provided so as to face a and extend in a direction perpendicular to the plane of the drawing. The upper part of the mounting member 11 in the drawing is fixed to the lower surface 3d of the beam 3 via the base plate 13, and the viscoelastic members 12A, 12B, 12C made of a viscoelastic material are provided between the member mounting surfaces 10a, 11a. Both mounting surfaces 10a and 11 in the direction perpendicular to the paper surface, that is, in the directions of arrows A and B in FIG.
It is provided so as to connect between a. The viscoelastic member 12A attached to the viscoelastic damper 6A has a property of exhibiting rigidity at a relatively low temperature, as shown in FIG. 4, and is attached to the viscoelastic damper 6B. 12
As shown in FIG. 4, B has a property of exhibiting rigidity at a temperature higher than that of the viscoelastic member 12A, and further, the viscoelastic member 12C attached to the viscoelastic damper 6C has a property as shown in FIG. In addition, it has the property of exhibiting rigidity at a higher temperature than the viscoelastic members 12A and 12C. As a result, in the temperature range EX that can normally change, any of the viscoelastic members 12A, 12B, 12C can hold a predetermined rigidity value GX suitable for absorbing vibration energy during an earthquake.

Since the structure 1 and the like have the above-described structure, when the structure 1 is vibrated in the directions of arrows A and B in FIG. 1 due to an earthquake or wind, the beam 3 and the wall 5 are separated. Arrow A between
Relative vibration is generated in the B direction, but the vibration is generated between the upper beam 3 and the wall 5 in the figure, and the viscoelastic dampers 6A, 6B, 6C shown in FIG. The viscoelastic members 12A, 12B, 12C in between deform and absorb the vibration energy. At this time, the viscoelastic member 1 of the viscoelastic dampers 6A, 6B, 6C provided in parallel between the beam 3 and the wall 5
As described above, 2A, 12B, and 12C have different temperature dependences on the rigidity as shown in FIG. 4, and therefore, over a wide temperature range EX in which the ambient temperature can change, an earthquake occurs. Since it is possible to always maintain a predetermined rigidity EX suitable for absorbing the vibration energy of the above, at least one viscoelastic damper 6A, 6B or 6C among the viscoelastic dampers 6A, 6B, 6C provided in parallel is provided.
Exhibits appropriate rigidity, and the energy absorption operation of vibration is smoothly performed.

In the above embodiment, the viscoelastic members 12A, 12B and 12C having different temperature dependences on the rigidity are attached to the viscoelastic dampers, respectively. The mounting mode is arbitrary, as long as a plurality of types of viscoelastic members having different temperature dependences on rigidity are provided in parallel between the beam and the wall. For example, as shown in FIG. The viscoelastic members 12A, 12B and 12C having different temperature dependences on rigidity are mounted in parallel between the member mounting surfaces 10a and 11a in one viscoelastic damper 6, respectively, and the viscoelastic damper is constructed. Of course, it is also possible to mount one or more between the pillar and the wall.

[0008]

As described above, according to the present invention,
In a structure having a plurality of pillars 2 and beams 3, and among these pillars and beams, earthquake-resistant element members such as walls 5 provided between adjacent pillars and beams, between the beams and the earthquake-resistant element members. In addition, since the viscoelastic members 12A, 12B, 12C having different temperature dependences on the rigidity are connected in parallel, the viscoelastic members 12A, 12B, 12C provided in parallel are not changed even if the ambient temperature changes. At least one or more of the viscoelastic members 12A, 12B, or 12C can exhibit appropriate rigidity, so that the energy absorption operation of vibration is smoothly performed, and the frame built-in type vibration damping device with little change in rigidity due to temperature is performed. It becomes possible to provide a device.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of a frame-incorporated vibration damping device according to the present invention,

FIG. 2 is a side view showing an example of a viscoelastic damper,

FIG. 3 is a front view showing another example of the viscoelastic damper,

FIG. 4 is a temperature-rigidity curve of various viscoelastic members.

[Explanation of symbols]

 1 ... Structure 2 ... Pillar 3 ... Beam 5 ... Seismic element member (wall) 12A, 12B, 12C ... Viscoelastic member

Claims (1)

[Claims] 1. A structure having a plurality of pillars and beams, wherein among these pillars and beams, seismic resistant element members are provided between adjacent pillars and beams, and between the beams and the seismic resistant element members. , A frame built-in type vibration damping device configured by connecting in parallel viscoelastic members having different temperature dependences on rigidity.